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Are defect models consistent with the entropy and specific heat of glass formers?
20.Even if the difference between the heat capacities of the glass and the crystal is small, the entropy of the glass, considered as a “frozen liquid,” is significantly higher than that of the crystal down to 0 K.
21.A very direct way to obtain Eq. (5) is writing the enthalpy per particle due to mobile cells and using the thermodynamic relation .
23.Even if there was a static interaction between defects, the entropy contribution cannot be larger than the ideal gas one.
24.This in principle does not directly apply to strongly cooperative defect models. Their structural relaxation timescale (and inverse of the defect density) can increase extremely fast when the temperature decreases or the particle density increases (Refs. 2, 3, and 6). But at the same time their entropy decreases mildly and smoothly in such a way that it is not necessary to have a very small entropy in order to have a very large relaxation time (Ref. 25).
26.C. A. Angell, APS Symposium Proceedings, Jour. Res. NIST, 102, 171 (1997);
, K. Kawasaki
, A. R. Bishop
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, and Z. Nussinov
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